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Het doel van deze thesis was om een maaier te ontwikkelen voor het maaien onder vangrails, maar ook rond palen, verkeersborden of bomen. De maaier moet een maaibreedte hebben van een meter. De uitdaging was om een maaier te ontwerpen die ook kan functioneren als de tussenafstand van de voorwerpen slechts een meter is. De maaier moet laag zijn zodat deze onder vangrails kan maaien. Lang gras en (metalen) zwerfvuil maken het moeilijk om een voorwerp te detecteren. Ook bij een variabele snelheid van de trekker en een wisselend reliëf van de bodem moet er 360° rond het voorwerp gemaaid worden.Zo werden er verschillende concepten bedacht. Voor één van deze concepten was er een uitgebreid onderzoek nodig. Er werd onderzocht of het gras gemaaid kan worden met een horizontale fijne waterstraal. Dit bleek echter niet mogelijk. Er werd beslist om een rad met vier maaischijven toe te passen. De maaiarmen zijn opgesteld zodat het rad uitermate compact is om aan de gestelde eisen te voldoen. Aan de hand van een translatie- en rotatiebeweging wordt het voorwerp ontweken.De volledige constructie werd uitgetekend in 3D en berekend op sterkte. Naast de mechanische uitwerking was de elektrohydraulische sturing een uitdaging. Er werden innoverende componenten gebruikt zoals een servocilinder, een draaicilinder, draadloze communicatie, snelheidsmeting via radar, … Al deze componenten worden op de gepaste manier aangestuurd en gecontroleerd door een PLC zodat er 360° rond het voorwerp gemaaid wordt. The aim of this thesis was to develop a mower for mowing under guardrails, around poles, traffic signs or trees. This mower must have a cutting width of one metre. It was a challenge to design a mower which is able to operate even if the distance between two objects is only one metre. The mower should be low enough because it must be able to reach beneath the guardrails. Furthermore it is difficult to develop a good system to detect objects, even if the grass is long or litter is blocking the way. The mower should also be able to revolve 360 degrees around an object at a variable speed of the tractor and a varying relief of the ground.So there are several concepts conceived. For one of these concepts an extensive investigation was needed. It was examined whether the grass can be cut with a horizontal fine water jet, but it turned out this is not possible. It was decided to apply a wheel with four cutting discs. The cutting arms were positioned in a way that the wheel is as compact as possible to meet the requirements. Based on translation and rotation movements the object is avoided.The complete construction was drawn in 3D and calculated on strength. In addition to the mechanical design, the electro hydraulic control was an interesting challenge. There were several innovative components used such as a servo cylinder, a rotary actuator, wireless communication, radar speed measurement, … All of these are controlled and verified by a PLC in the appropriate manner so that it is possible to mow 360 degrees around an object.
Aandrijftechniek - mechanism-engineering. --- Automatisering - automation. --- Berm. --- CAD - CAD. --- Elektrohydraulische sturing. --- Hydraulica - hydraulics. --- Maaien. --- Machinebouw - machines. --- Vangrail.
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This book presents 16 selected papers from the 7th International Conference on The Application of Physical Modelling in Coastal and Port Engineering and Science, Coastlab18. The conference was organized in Santander, Spain, from 22 to 26 May, 2018, by the Instituto de Hidráulica Ambiental de la Universidad de Cantabria, IHCantabria. Coastlab18 welcomed 175 attendees from 18 different countries. The technical program included three renowned keynote lectures and 120 presentations focused on theoretical and practical aspects related to physical modelling in the field of coastal and ocean engineering. Coastal and ocean structures, breakwaters, revetments, laboratory technologies, measurement systems, coastal field measurement and monitoring, combined physical and numerical modelling, physical modelling case studies, tsunamis, and coastal hydrodynamics were the main topics covered in the conference. This book attempts to cover, as completely as possible, all the topics presented during the conference. The papers were accepted after a peer-review process based on their full text.
History of engineering & technology --- hydraulic stability --- breaking wave conditions --- low-crested structures --- mound breakwaters --- armor layer --- overtopping --- dikes --- sea defenses --- bimodal seas --- swell --- oblique waves --- crossing seas --- wave basin --- mound breakwater --- armor stability --- Cubipod® --- breaking waves --- non-overtopping --- horizontal foreshore --- regular waves --- Stepped revetment --- wave impact --- physical model test --- rock slopes --- damage characterization --- damage parameters --- physical model tests --- linear waves --- nonlinear waves --- wavemaker theory --- wavemaker applicability --- outdoor wave basin --- long-term development --- vegetation development --- ecosystem services --- nature-based --- vertical barrier --- semi-submerged --- wind waves --- experiments --- laboratory --- operational system --- wave forecast --- wave modelling --- Mediterranean Sea --- monitoring program --- beach management --- bichromatic waves --- reflection separation --- bound waves --- stability --- erosion --- sea level rise --- repetition tests --- berm --- wave flume --- length effect --- aquaculture --- drag --- inertia --- Abbott–Firestone Curve --- laboratory tests --- physical model experiments --- scouring --- shingle foreshore --- sloping wall --- combined field experiment and numerical modeling --- overwash --- wave run-up --- infragravity waves --- XBeach --- coastal flooding --- dune erosion --- landslide waves --- tsunamis --- laboratory experiments --- momentum balance --- numerical wave modeling --- vertical cylinder --- DNS model --- pressure gradient --- wave force --- scour and shear stress --- n/a --- Abbott-Firestone Curve
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This book presents 16 selected papers from the 7th International Conference on The Application of Physical Modelling in Coastal and Port Engineering and Science, Coastlab18. The conference was organized in Santander, Spain, from 22 to 26 May, 2018, by the Instituto de Hidráulica Ambiental de la Universidad de Cantabria, IHCantabria. Coastlab18 welcomed 175 attendees from 18 different countries. The technical program included three renowned keynote lectures and 120 presentations focused on theoretical and practical aspects related to physical modelling in the field of coastal and ocean engineering. Coastal and ocean structures, breakwaters, revetments, laboratory technologies, measurement systems, coastal field measurement and monitoring, combined physical and numerical modelling, physical modelling case studies, tsunamis, and coastal hydrodynamics were the main topics covered in the conference. This book attempts to cover, as completely as possible, all the topics presented during the conference. The papers were accepted after a peer-review process based on their full text.
hydraulic stability --- breaking wave conditions --- low-crested structures --- mound breakwaters --- armor layer --- overtopping --- dikes --- sea defenses --- bimodal seas --- swell --- oblique waves --- crossing seas --- wave basin --- mound breakwater --- armor stability --- Cubipod® --- breaking waves --- non-overtopping --- horizontal foreshore --- regular waves --- Stepped revetment --- wave impact --- physical model test --- rock slopes --- damage characterization --- damage parameters --- physical model tests --- linear waves --- nonlinear waves --- wavemaker theory --- wavemaker applicability --- outdoor wave basin --- long-term development --- vegetation development --- ecosystem services --- nature-based --- vertical barrier --- semi-submerged --- wind waves --- experiments --- laboratory --- operational system --- wave forecast --- wave modelling --- Mediterranean Sea --- monitoring program --- beach management --- bichromatic waves --- reflection separation --- bound waves --- stability --- erosion --- sea level rise --- repetition tests --- berm --- wave flume --- length effect --- aquaculture --- drag --- inertia --- Abbott–Firestone Curve --- laboratory tests --- physical model experiments --- scouring --- shingle foreshore --- sloping wall --- combined field experiment and numerical modeling --- overwash --- wave run-up --- infragravity waves --- XBeach --- coastal flooding --- dune erosion --- landslide waves --- tsunamis --- laboratory experiments --- momentum balance --- numerical wave modeling --- vertical cylinder --- DNS model --- pressure gradient --- wave force --- scour and shear stress --- n/a --- Abbott-Firestone Curve
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This book presents 16 selected papers from the 7th International Conference on The Application of Physical Modelling in Coastal and Port Engineering and Science, Coastlab18. The conference was organized in Santander, Spain, from 22 to 26 May, 2018, by the Instituto de Hidráulica Ambiental de la Universidad de Cantabria, IHCantabria. Coastlab18 welcomed 175 attendees from 18 different countries. The technical program included three renowned keynote lectures and 120 presentations focused on theoretical and practical aspects related to physical modelling in the field of coastal and ocean engineering. Coastal and ocean structures, breakwaters, revetments, laboratory technologies, measurement systems, coastal field measurement and monitoring, combined physical and numerical modelling, physical modelling case studies, tsunamis, and coastal hydrodynamics were the main topics covered in the conference. This book attempts to cover, as completely as possible, all the topics presented during the conference. The papers were accepted after a peer-review process based on their full text.
History of engineering & technology --- hydraulic stability --- breaking wave conditions --- low-crested structures --- mound breakwaters --- armor layer --- overtopping --- dikes --- sea defenses --- bimodal seas --- swell --- oblique waves --- crossing seas --- wave basin --- mound breakwater --- armor stability --- Cubipod® --- breaking waves --- non-overtopping --- horizontal foreshore --- regular waves --- Stepped revetment --- wave impact --- physical model test --- rock slopes --- damage characterization --- damage parameters --- physical model tests --- linear waves --- nonlinear waves --- wavemaker theory --- wavemaker applicability --- outdoor wave basin --- long-term development --- vegetation development --- ecosystem services --- nature-based --- vertical barrier --- semi-submerged --- wind waves --- experiments --- laboratory --- operational system --- wave forecast --- wave modelling --- Mediterranean Sea --- monitoring program --- beach management --- bichromatic waves --- reflection separation --- bound waves --- stability --- erosion --- sea level rise --- repetition tests --- berm --- wave flume --- length effect --- aquaculture --- drag --- inertia --- Abbott-Firestone Curve --- laboratory tests --- physical model experiments --- scouring --- shingle foreshore --- sloping wall --- combined field experiment and numerical modeling --- overwash --- wave run-up --- infragravity waves --- XBeach --- coastal flooding --- dune erosion --- landslide waves --- tsunamis --- laboratory experiments --- momentum balance --- numerical wave modeling --- vertical cylinder --- DNS model --- pressure gradient --- wave force --- scour and shear stress
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This book is a collection of all papers published in the Special Issue “Coastal Vulnerability and Mitigation Strategies: From Monitoring to Applied Research”. The main focus is to provide the state-of-the-art and recent research updates on sustainable management strategies for protecting vulnerable coastal areas. Based on 28 contributions from authors representing 17 different countries (Australia, China, Ecuador, Germany, Greece, India, Italy, Mexico, The Netherlands, New Zealand, Poland, Spain, Sri Lanka, Taiwan, United Arab Emirates, UK, USA), an ensemble of interdisciplinary articles has been collected, emphasizing the importance of tackling technical and scientific problems at different scales and from different point of views.
brackish lagoon types --- benthic macrophytes --- salinity --- succession --- univariate variables --- Greece --- spectral analysis --- low frequency --- wave grouping --- eigen analysis --- eigenmode --- random waves --- combination waves --- wave extreme events --- Mediterranean Sea --- North Atlantic Spanish coasts --- Gulf of Mexico --- wave modeling --- small scale storm variations --- tsunami-like solitary waves --- horizontal cylinders --- hydrodynamic loads --- experimental tests --- Morison and transverse equations --- hydrodynamic coefficients --- climate change --- multiobjective optimization --- coastal region --- pumping plant --- flooding --- historical cartography --- shore protection structures history --- groins --- gently sloping revetment --- earthquake --- tsunami --- strategic retreat --- salinity intrusion --- MIKE modelling --- sea level rise --- Mekong Delta --- drag coefficients --- oscillatory flows --- force sensors --- synchronization --- automatic alignment --- coastal plan --- erosion, coastal flooding --- sediment budget --- mitigation strategies guidelines --- littoral cell --- wave hindcasting --- Abu Dhabi --- shallow waters --- Shore Protection Manual --- wave climate --- coastal defense --- risk maps --- non-engineering measure --- coastal vulnerability --- eco-defense --- coastal morphodynamics --- mangroves --- flood attenuation --- natural defense --- beach nourishment --- beach drainage system --- groundwater --- submerged breakwater --- cross-shore sediment transport --- coastal vulnerability index --- storm surges --- waves action --- Mediterranean coasts --- extreme events --- threshold values --- probability --- hydrometeorological conditions --- Baltic coast --- climate changes --- sea-level rise --- TELEMAC --- natural beach --- flooded area --- seaside impacts --- Mar Menor --- long-term GIS analysis --- marine infrastructures impact --- coastal urbanization impact --- coastal erosion --- shore protection --- coastal armouring --- 3S tourism --- beach economy --- aeolian processes --- onshore and offshore winds --- Southern Baltic coast --- beach resilience --- beach resistance --- temporary groin --- sea breezes --- resilience index --- GSb model --- Yucatan peninsula --- BERM-N --- sand nourishments --- Bayesian belief network --- JarKus data --- coastal state indicators --- dune foot --- momentary coastline --- Holland coast --- vegetation stiffness --- bending elastic modulus --- velocity distribution --- turbulence intensity --- wave dissipation --- marine inundation --- FORM --- reliability analysis --- Veneto coast --- natural hazards --- disasters --- coastal Andhra Pradesh --- Unmanned Aerial Vehicles --- energy flux --- storm classification --- stormy year --- Andalusia coast --- beach morphodynamics --- UAV flights --- beach surveys --- Reef Balls™ --- sand-filled geosystems --- wave numerical model --- directional wave spectra drifter (DWSD) --- ADCP --- GPS wave buoy --- triple collocation --- Bagnoli-Coroglio Bay --- arsenic --- hydrocarbons --- heavy metals contamination --- marine pollution --- multivariate analysis --- Bagnoli --- Naples --- coastal monitoring --- coastal morphodynamic --- coastal management --- coastal ecosystem
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This book is a collection of all papers published in the Special Issue “Coastal Vulnerability and Mitigation Strategies: From Monitoring to Applied Research”. The main focus is to provide the state-of-the-art and recent research updates on sustainable management strategies for protecting vulnerable coastal areas. Based on 28 contributions from authors representing 17 different countries (Australia, China, Ecuador, Germany, Greece, India, Italy, Mexico, The Netherlands, New Zealand, Poland, Spain, Sri Lanka, Taiwan, United Arab Emirates, UK, USA), an ensemble of interdisciplinary articles has been collected, emphasizing the importance of tackling technical and scientific problems at different scales and from different point of views.
Research & information: general --- brackish lagoon types --- benthic macrophytes --- salinity --- succession --- univariate variables --- Greece --- spectral analysis --- low frequency --- wave grouping --- eigen analysis --- eigenmode --- random waves --- combination waves --- wave extreme events --- Mediterranean Sea --- North Atlantic Spanish coasts --- Gulf of Mexico --- wave modeling --- small scale storm variations --- tsunami-like solitary waves --- horizontal cylinders --- hydrodynamic loads --- experimental tests --- Morison and transverse equations --- hydrodynamic coefficients --- climate change --- multiobjective optimization --- coastal region --- pumping plant --- flooding --- historical cartography --- shore protection structures history --- groins --- gently sloping revetment --- earthquake --- tsunami --- strategic retreat --- salinity intrusion --- MIKE modelling --- sea level rise --- Mekong Delta --- drag coefficients --- oscillatory flows --- force sensors --- synchronization --- automatic alignment --- coastal plan --- erosion, coastal flooding --- sediment budget --- mitigation strategies guidelines --- littoral cell --- wave hindcasting --- Abu Dhabi --- shallow waters --- Shore Protection Manual --- wave climate --- coastal defense --- risk maps --- non-engineering measure --- coastal vulnerability --- eco-defense --- coastal morphodynamics --- mangroves --- flood attenuation --- natural defense --- beach nourishment --- beach drainage system --- groundwater --- submerged breakwater --- cross-shore sediment transport --- coastal vulnerability index --- storm surges --- waves action --- Mediterranean coasts --- extreme events --- threshold values --- probability --- hydrometeorological conditions --- Baltic coast --- climate changes --- sea-level rise --- TELEMAC --- natural beach --- flooded area --- seaside impacts --- Mar Menor --- long-term GIS analysis --- marine infrastructures impact --- coastal urbanization impact --- coastal erosion --- shore protection --- coastal armouring --- 3S tourism --- beach economy --- aeolian processes --- onshore and offshore winds --- Southern Baltic coast --- beach resilience --- beach resistance --- temporary groin --- sea breezes --- resilience index --- GSb model --- Yucatan peninsula --- BERM-N --- sand nourishments --- Bayesian belief network --- JarKus data --- coastal state indicators --- dune foot --- momentary coastline --- Holland coast --- vegetation stiffness --- bending elastic modulus --- velocity distribution --- turbulence intensity --- wave dissipation --- marine inundation --- FORM --- reliability analysis --- Veneto coast --- natural hazards --- disasters --- coastal Andhra Pradesh --- Unmanned Aerial Vehicles --- energy flux --- storm classification --- stormy year --- Andalusia coast --- beach morphodynamics --- UAV flights --- beach surveys --- Reef Balls™ --- sand-filled geosystems --- wave numerical model --- directional wave spectra drifter (DWSD) --- ADCP --- GPS wave buoy --- triple collocation --- Bagnoli-Coroglio Bay --- arsenic --- hydrocarbons --- heavy metals contamination --- marine pollution --- multivariate analysis --- Bagnoli --- Naples --- coastal monitoring --- coastal morphodynamic --- coastal management --- coastal ecosystem
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